package com.bytezero.bytezero_weather;

import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;

import com.bytezero.bytezero_weather.db.City;
import com.bytezero.bytezero_weather.db.County;
import com.bytezero.bytezero_weather.db.Province;
import com.bytezero.bytezero_weather.util.HttpUtil;
import com.bytezero.bytezero_weather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;


public class ChooseAreaFragment extends Fragment {

    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;
    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList=new ArrayList<>();

   private List<Province> provincesList;
   private List<City> cityList;
   private List<County> countyList;

   /**
    选中的省份
    */
   private Province selectedProvince;
   /**
   选中的城市
    */
   private City selectedCity;
    /**
     * 当前选中的级别
     */
   private int currentLevel;

    @RequiresApi(api = Build.VERSION_CODES.M)

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
       View view=inflater.inflate(R.layout.choose_area,container,false);
       titleText=(TextView)view.findViewById(R.id.title_text);
       backButton=(Button)view.findViewById(R.id.back_button);
       listView=(ListView)view.findViewById(R.id.list_view);
       adapter=new ArrayAdapter<>(getContext(),android.R.layout.simple_list_item_1,dataList);
       listView.setAdapter(adapter);
       return view;
    }

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if(currentLevel==LEVEL_PROVINCE){
                    selectedProvince=provincesList.get(position);
                    queryCities();
                }else if(currentLevel==LEVEL_CITY)
                {
                    selectedCity=cityList.get(position);
                    queryCounties();
                }else if(currentLevel==LEVEL_COUNTY)
                {
                    String weatherId=countyList.get(position).getweatherId();
                    if(getActivity() instanceof com.bytezero.bytezero_weather.MainActivity) {
                        Intent intent = new Intent(getActivity(), WeatherActivity.class);
                        intent.putExtra("BytezeroWeather", weatherId);
                        startActivity(intent);
                        getActivity().finish();
                    }
                    else if(getActivity() instanceof WeatherActivity)
                    {
                        WeatherActivity activity=(WeatherActivity)getActivity();
                        activity.drawerLayout.closeDrawers();
                        activity.swipeRefresh.setRefreshing(true);
                        activity.requestWeather(weatherId);
                    }
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(currentLevel==LEVEL_COUNTY)
                {
                    queryCities();

                }else if(currentLevel==LEVEL_CITY)
                {
                    queryProvinces();
                }

            }
        });
        queryProvinces();
    }

    /**
     * 查询中国所有的省,优先从数据库查询,如果没有查询到再到服务器上去查
     */
    private void queryProvinces()
    {
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provincesList= DataSupport.findAll(Province.class);
        if(provincesList.size()>0)
        {
            dataList.clear();
            for(Province province:provincesList)
            {
                dataList.add(province.getProvinceName());

            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_PROVINCE;
        }else
        {
            String address="http://guolin.tech/api/china";
            queryFromSever(address,"province");

        }
    }
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);

        cityList = DataSupport.where("provinceid=?", String.valueOf(selectedProvince.getId())).find(City.class);

        if (cityList.size() > 0) {
            dataList.clear();
            for (City city : cityList) {
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_CITY;
        } else{
            int provinceCode=selectedProvince.getProvinceCode();
            String address="http://guolin.tech/api/china/"+provinceCode;
            queryFromSever(address,"city");
        }
    }

    private void queryCounties() {
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);

        countyList = DataSupport.where("cityid=?", String.valueOf(selectedCity.getId())).find(County.class);

        if (countyList.size() > 0) {
            dataList.clear();
            for (County county : countyList) {
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        } else{
            int provinceCode=selectedProvince.getProvinceCode();
            int cityCode=selectedCity.getCityCode();
            String address="http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
            queryFromSever(address,"county");
        }
    }

    /**
     * 根据传入的地址和类型从服务器上查询省市县数据
     * @param address
     * @param type
     */
    private void queryFromSever(String address, final String type)
    {showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                getActivity().runOnUiThread(new Runnable() {
                    @RequiresApi(api = Build.VERSION_CODES.M)
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show();
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseText=response.body().string();
                boolean result=false;
                if("province".equals(type))
                {
                 result= Utility.handleProvinceResponse(responseText);
                }else  if("city".equals(type))
                {
                    result= Utility.handleCityResponse(responseText,selectedProvince.getId());
                }else  if("county".equals(type))
                {
                    result= Utility.handleCountyResponse(responseText,selectedCity.getId());
                }

                if(result)
                {
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if("province".equals(type))
                            {
                                queryProvinces();
                            }else if("city".equals(type))
                            {
                                queryCities();
                            }
                            else if("county".equals(type))
                            {
                                queryCounties();
                            }
                        }
                    });
                }

            }
        });

    }

    /**
     * 显示进度框
     */
    private void showProgressDialog() {
        if(progressDialog==null)
        {
            progressDialog=new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载....");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }

    /**
     * 关闭进度条
     */
    private void closeProgressDialog()
    {
        if(progressDialog!=null)
            progressDialog.dismiss();
    }
}
